Electron-discharge device



Jan. 8 1924.

R. W. KING ELECTRON DISCHARGE DEVICE Filed Auz. 13 1919 Patented Jan. 8,1924.

ROBERT W. KING, OF NEW YORK, N. Y., ASSIGNOR TO INCORPORATED, OF NEWYORK, N.

WESTERN ELECTRIC COMPANY, Y., A CORPORATION OF NEW YORK.

ELECTRON-DISCHARGE DEVICE.

Application filed August 18, 1919. Serial No. 317,814.

To all whom it may concern:

Be it known that I Roena'r W.KING, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Electron- Dischar eDevices, of which the follow ng is a ful clear, concise, and exactdescription.

The invention relates to improvements in the mounting of electrodes forvacuum tube devices, and by way of example is illustrated and describedas embodied in an electron discharge device of the audion type. It hasbeen common in vacuum tube devlces to support one or more of theelectrodes from a glass rod or arbor which projects into the tube. Theuse of a fragile support, such as a glass rod, is objectionable,however, due to the frail character of the support.

An object of the present invention is to avoid, to a large extent atleast, the use of a glass supporting structure for an electrode orelectrodes to the end that a stronger and more rug ed mounting may beemployed instead. his is accomplished, according to the presentinvention, by providing a metallic supporting connection between theplate electrodes and the press or squash in which the leading-in wiresare sealed. The support for the grid and filament is provided in theform of a block of insulating material connected to one of the plateelectrodes.

For further details of the invention, reference may be made to thedrawing in which the figure illustrates in perspective a vacuum tubeembodying the features of this invention. Referring in detail to thedrawings, the vacuum tube 1 is provided with the usual inwardlyprojecting neck 2, which terminates in a press 3 in which the leading-inwires are sealed. The electrodes in this case comprise an M-shapedfilament 4. a double grid surface 5, and a double plate electrode 6.Filament 4 is supported at its lower ends by wires 7, 8 and 9, the wires7 and 9 being extended to rovide terminals for sugplying current to t efilament. The plate ectrode 6 comprises two plate-shaped elements 10 and11, which have upturned as shown. At the top of or above the, lateelement 10 is fastened a strip of insulating material 12 which may be oflavite. The block 12 is fastened to the plate 10 by the rods 13 and 14which are welded to the plate 10 at the lower ends and suitably anchoredin apertures in block 12 at their upper ends. The wire 15 fastened inthe block 12 and having the coils 16 intermediate its length serves toresiliently support the filament 4, contacting with the bi hts thereofat 17 and 18, as shown.

he grid is supported at its lower end b the wire 19 welded to the gridand exten ing through the press to form a leading-in wire. The upper endof the grid is supported from the block 12 by the wire 20 connectedthereto and to the grid, and by a similar wire 21 at the other side ofthe electrode structure.

The-plate elements 10 and 11 are electrically and mechanically connectedtogether b the wires 22, 23 welded to the upturned e ges of the plateelements, and by similar wires at the other side of the plate electrode.The plate electrode structure is a unitary one and is separated from thepress 3 by metallic means such as the U-shaped metal pieces 24, 25, thearms of which are welded to the plate elements 10 and 11. The U-shapedsu ports 24 and 25 are suitably fastened to t e press, for instance, byintegral extensions 26 and 27 respectivel which extend into and aresealed into the press 3.

This vacuum tube is not limited for use in any particular vacuum tubecircuit, but as illustrating one type of circuit that may be employedreference is made to the patent to Arnold 1,129,942, March 2, 1915.

While the electrode supporting features have been shown as applied toelectron discharge devices of the audion type, they may be applied toX-ray or other vac-mm tubes.

What is claimed is:

1. A vacuum tube comprising a press, anode, cathode and controlelectrodes, a forked metallic member mounted on said press andsupportingly associated with said anode, and supporting connectionsbetween said anode and control electrode. a

2. A. vacuum tube comprising a press, parallel plates, a. plurality offorked metallic members mounted on said press, each arm of each of saidmembers being supportingly associated with each of said plates.

3. A vacuum tube comprising a press, metallic members having armsmounted on said press, the corresponding arms of each memher extendingarallel to each other and plates supporte by said arms in parallelrelation to each other.

4. A vacuum tube comprising a ress, a cathode, an anode and a grid, saianode comprising parallel plate surfaces, a plurality of parallelmetallic members mounted on said Press, and a plurality of armsprojecting rom each of said metallic members, each of said arms beingconnected to one of said plate surfaces.

5. A vacuum tube comprising a plurality of electrodes one of which is aplate electrode, insulating material supported by said plate electrodeabove one edge thereof, and a supporting connection from said insulatingmate-ma to one of said other electrodes.

6. A vacuum tube comprising a cathode, a grid and an anode, insulatingmaterial supported by said anode above one edge thereof,

and supporting connections from said insulating material to said gridand cathode.

7. An electron discharge device comprising a vessel having a stem, ananode supported from said stem, members carried by said anode andprojecting beyond one edge thereof, a body of insulating material supported by said membeis, a cathode and a supporting connection from saidinsulating body to said cathode.

In witness whereof, I hereunto subscribe my name this 11th day ofAugust, A. I), 1919.

. ROBERT W. KING.

DiSOLAIMER 1,479,991.Robqt W. King, New York N. Y. Ennc'rnoN' DISCHARGEDzvxcs. Patent dated-January 8, 1924. Dieciejmer filed August 8, 1931,by the esaignee, Western Electric Company, Incorporated.

Hereby n ers this disclaimer relative to claims 5 and 6 of said LettersPatent to wit: To the eombmatiomof elements set forth in claims 5 and 6of said Letters Patent, xcept as the surge are embodied in a vacuum tubewherein the insulating materiel is gi -Myer! by an mtervening space fromthe edge of the plate electrode or anode by w ch 1!; 1a supper [QflicwlGazetle September 1, 1931.]

